Lubricating system.



P. DAIMLER & A; HEESS.

LUBRIGATING SYSTEM.

APPLICATION FILED APILB, 1912.

1,050,108. PatentedJ-an. 14,1918.

PAUL DAIMLER AND FIRM OF DAIMLER MOTORENGESELLS GERMANY.

ALBERT HEESS, OF C ANNSTATI GE XEMANY, ASSIGNORS TO THE CHAFT, OFSTUTTGART-UNTERT'tlRKHEIM,

LUBRICATING SYSTEM.

Specification of Letters Patent. Application filed April 8, 1912.

, Patented Jan. Serial No. 689,317.

To all z /mm it may concern:

e it known that we, PAUL DAIMLER, a sub ect of the King of\Vurt-temberg, and

resident of 87 Vaiblingerstrasse, Cannstatt,

Kingdom of urttemberg, German Empire, and ALBERT Hiauss, a subject ofthe King of l/Vurttemberg, and resident of 36 Hohenstaufenstrasse,Cannstut't,Kingdom of W'urttemberg, German Empire, have jointly inventeda new and Improved Lubricating System, of which the following isaspecification.

This invention relates to an improved lubricating system of the type inwhich a I to the prior United States plurality of pumps are provided,eachconnected to the respective part to be lubricated.

Hitherto it has been usual to employ pumps of the type in which thesupply of lubricant to the pump cylinder is controlled by a separatepiston valve, such as is described for example in the specification ofPatent No. 1012332. In such cases however,- a separate piston valve isrequired for each pump, thus consid bly complicating the lubricatingsys- The'obg'ect of the present invention is to simplify theconstruction of such lubricatmgeystems by di spensing with the auxiliarypiston valves and fen this purpose the pistons of the pump cylinders areso constructed and st-itutes the controlling valve for the nextsucceeding pump.

llccording to the present invention the piston of each pump isconstructed of dif terential diameter adapted to work within part of thepump piston forces the oil in [me pump. cylinder arranged that. eachpiston con- I auxiliary pump supplying the lubricant to series of tenpumps.

In order'that our invention may be more clearly understood,

a designates the -reservoir for the lubricant and b the pump cylinder ofthe auxiliary pump. The cylinders of the main pumps are constructed ofdifferential diameter, the larger part of the main pumps beingdesignatedby b, b and 5 respectively, and the smaller respectively inthe accompanying draw- Arranged within the pump cylinder to draw oilinto the cylinder through the ports 9 and to force the oil through theconnection 7a to the interior of 6 of the first main pump cylinder.Within the main pump cylinders are adapted to work the differentialpistons 0' d", c d and c (17 respectively. The pump cylinders areconnected in series by means of connections 71. b connecting the largerpart of one cylinder to the smaller part of the next cylinder, while thelarger part b of the last pump cylinder may be connected to anadditional pump or to the reservoir a by means of a connection 12. Thepump pistons ar'e adapted to be'driven from a main driving shaft 6through any motion illustrated diagrammatically on the drawings ascomprising shafts e, 6', and

e driven from the shaft 2' and carrying eccentrics Z, Z, Z and Zrespectively, to the pump pistons by means of the connecting rods m,m,'m and m respectively. The oil in the smaller parts 6 6 and 5respcctively of the pump cylinders is adapted to be supplied to theparts to be through the delivery pipes 70, 70 spectively. Y

The operation of the foregoing lubricating system is as follows :On therotation of the eccentrics e, 6, e 6 the pistons are reciprocated withincylinders. The piston f draws in lubricant through the port 9 and on itsdownward stroke forces the lubricant through the conand A reparts by 6 6and suitable reciprocatory their respective pump the smaller partlubricated nection h to the interior of the smaller part on thedown-strokeof the piston the lubricant in the larger part. b isdischarged through the connection h into'the smaller part b of the nextsucceeding pump cylinder. The pistons 0 d and c d operate in theircorresponding pump cylinders in a manner similar to the operation of thepiston c d in the first main pump cylinder. It will be readilyunderstood that anynumber of such main pumps may be arranged in series,and that it is onl necessary to provide an'auxiliary pump or supplyinglubricant to the first pump cylinder 6 of the series of main pumps.

1. A lubricating systemfor supplying lubricant from a plurality of pumpsto a plurality of parts to be lubricated, comprising a plurality of pumpcylinders connected in series and to the parts to be lubricated, eachpump cylinder having an oil inlet port, and a piston reciprocated ineach cylinder and overrunning the inlet ports therein so that 7 eachpiston supplies 011 to the next succeeding cylinder on its compressionstroke.

2. A lubricating system for supplying lubricant from a plurality ofpumps to a plurality of parts to be lubricated, comprising a pluralityof :main pump cylinders connected in series and to the parts to'belubricated, each pump cylinder having an. oil inlet port, a pistonreciprocated in each cylinder and overruiming the inlet port therein, anauxiliary pump cylinder having an oil inlet 'port, and a pistonreciprocated in said auxiliary pumpcylinder and over-running theinlet-port thereof so as to supply oil to the first of the series ofmain pump cylinders on its compression stroke, the piston of each mainpump cylinder overrunning the inlet port therein so as to supply oil tothe next succeeding'main pump cylinder on its compression-stroke.

3. A lubricating system for supplying lubricant from a plurality ofpumps to a plurality of parts to be lubricated and connectedrespectively thereto, comprisin a plurality of main pump cylinders of dierential diameter connected independently to the parts to be lubricatedand in series with each other, means for supplying lubricant to each ofsaid main pump cylinders and differential pistons working in saidcylinders, one part of each of said differential pistons forcing thelubricant to th parts to be lubri' cated and the other part of each ofsaid differential pistons supplying lubricant to the next succeedingpump cylinder.

4. A lubricating system for supplying lubricant from a plurality ofpumps to a plurality of parts to be lubricated and connectedrespectively thereto, comprisin a plurality of main pump cylinders of dier ential diameter connected independently to the parts to be lubricatedand in series with each other, means for suplying lubricant to each ofsaid main pump cylirideis, differential pistons working in saidcylinders, one

part of each of said differential pistons forcing the lubricant to theparts to be'lubricated and the other part of each of said differentialpistons supplying lubricant to thenext succeeding pump cylinder, anauxiliarypump cylinder, means for'supplying lubricant to said auxiliarypump cylinder and a piston working in said auxiliary pump cylindelandsupplying lubricant to the first of said series of main pump cylinders.

In witness whereof we have hereunto set our hands in the presence of twowitnesses.

PAUL DAIMLER,

ALBERT HEESS.

Witnesses:

CARL GAERTT'NER, ROBERT UHLAND.

